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New-Old-Stock

By Neville on Jan 12 2012 | 0 Comments
It never ceases to amaze me just how many original parts and original unpublished accounts/documents still turn up for the XJ13/quad-cam engines after so many years. Recent discoveries have included a complete set of UNUSED inlet valves for the quad-cam heads as well as previously undiscovered photo... [More]

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How many quad-cam V12s were built and where are they now?

By Neville on Oct 21 2011 | 0 Comments
  Click HERE to download this post for your Amazon Kindle and read at your leisure. A question often asked of me is, "How many prototype V12 quad-cam engines were built by Jaguar and where are they now?" As I reported on this blog back in May 2010, the answer is SI... [More]

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Prototype V12 - Rebuild Specification - Cam Drive

By Neville on Jun 22 2011 | 0 Comments
Determination of correct specification for rebuild of prototype quad-cam V12 engine [More]

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Categories: Jaguar V12 , Original XJ13

Prototype V12 - Part 4 - Stripdown

By Neville on Feb 27 2011 | 0 Comments
In January of 2011, on a very cold January morning, the restoration of my quad-cam V12 began in earnest with a total stripdown and detailed examination. [More]

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Categories: Jaguar V12 , Original XJ13

Walter Hassan - Bentley, ERA, Coventry-Climax and Jaguar

By Neville on Nov 19 2010 | 0 Comments
As part of my research into the background of my prototype V12 engine, and as its rebuild looms (details to follow ...), I came across the story of a key man involved in its design - Walter T.F.Hassan, O.B.E.,M.I.Mech.E. What follows is the story of one of this country's most gifted designers of hig... [More]

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The Jaguar V12 : Evolution

By Neville on Jul 14 2010 | 0 Comments
My previous post looked at the development of the quad-cam V12 – I now look at how this evolved into the first single-overhead-cam V12 engine.Much has already been published elsewhere – not least of all by renowned authors Skilleter, Whyte, Porter, Viart/Cognet et al. I hope to add to th... [More]

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Categories: Jaguar V12

The Jaguar V12 : Development

By Neville on Jul 12 2010 | 1 Comments
Last month I made a post looking at the origins of the V12 – this month I look at the development of the V12 in a little more detail.Before the V12, Jaguar’s racing and practically all road cars were powered by the powerful and renowned XK straight-six double overhead-cam unit. This engi... [More]

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Categories: Jaguar V12 , Original XJ13

Prototype V12 - Part 3

By Neville on Jul 02 2010 | 0 Comments
Lucas Fuel Injection Fuel supply to the original 1966 XJ13 was managed by Lucas Mechanical Fuel Injection. This system was retained by Jaguar when the car was rebuilt in 1972/73 and remains with it today. The heart of the system is the Lucas metering unit which sits in the "V" of the engine and ... [More]

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The Jaguar V12

By Neville on May 29 2010 | 0 Comments
Part One - Origins For 25 years, between 1971 and 1996, Jaguar’s smooth and refined V12 power unit powered the Series 3 E-Type as well as a range of luxury saloons. Right from the outset the engine was designed with enormous tuning potential reserves and, in racing form, powered cars such as... [More]

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Categories: Jaguar V12


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